package main

import "fmt"

func add(a int,b int) int {
	return a+b
}
func add2(a,b int) int{
	return a+b
}
func exists(m map[string]string,k string)(v string,ok bool){
	v,ok = m[k]
	return v,ok
}
func main() {
	res := add(1,2)
	fmt.Println(res)

	v,ok := exists(map[string]string{"a":"A"},"a")
	fmt.Println(v,ok)
}

